.concent {
    width: 1200px;
    margin: 0 auto;
}

/* 源码大数据头部 */
header {
    display: flex;
    border-bottom: 1px solid skyblue;
    margin-bottom: 50px;

}

header .nav {
    padding-top: 20px;
    padding-left: 20px;

}

header .nav-1 {
    display: flex;
    justify-content: center;
    margin-left: 66px;
}

header .nav-1 li {
    margin: 0 10px;
    height: 66px;
    line-height: 66px;
}

header .nav-1 li:nth-child(2) {
    border-bottom: 1px solid skyblue;
    color: skyblue;
}

header .nav-2 {
    display: flex;
    align-items: center;
}

header .nav-2 li:nth-child(1) {
    border-radius: 13px;
    border: 1px solid;
    width: 60px;
    height: 24px;
    text-align: center;
    margin-right: 10px;
    font-size: 10px;
    line-height: 24px;
    color: #d1d1d1;
}

header .nav-2 li:nth-child(1) a {
    color: black;
}

header .nav-2 li:nth-child(2) {
    border-radius: 13px;
    border: 1px solid;
    width: 77px;
    height: 25px;
    text-align: center;
    margin-right: 40px;
    font-size: 10px;
    line-height: 25px;
    background: orange;
    color: white;
}

header .nav-2 li:nth-child(2) a {
    color: white;
}

/* 主体部分 */
main .main-0 {
    margin-bottom: 20px;
}

main .main-1 {
    display: flex;
    flex-wrap: wrap;
}

main .main-1 li {
    width: 110px;
    height: 21px;
    border-radius: 13px;
    border: 1px solid #d1d1d1;
    text-align: center;
    margin: 0 10px;
    margin-bottom: 10px;
}

main .main-1 li a {
    color: black;
}

main .main-1 li:nth-child(13) a {
    font-weight: 700;
}

main .main-2 {
    display: flex;
    position: relative;
    margin-bottom: 20px;
}

main .main-2 li:nth-child(1) {
    font-size: 14px;
    font-weight: 700;
}

main .main-2 li:nth-child(2) input {
    width: 230px;
    height: 30px;
    background-color: #f4f4f4;
    text-indent: 16px;
    font-size: 12px;
    border-radius: 16px;
    color: #666;
    border: none;
    margin-left: 20px;
    outline: none;
}

main .main-2 li:nth-child(3) img {
    position: absolute;
    top: 6px;
    left: 250px;
    cursor: pointer;
}

/* 图片框 */
main .main-3 {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

main .main-3 li {
    width: 228px;
    height: 270px;
    margin-bottom: 10px;
    border: 1px solid #d1d1d1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

main .main-3 li img {
    margin-bottom: 10px;
}

main .main-3 li .span1 {
    position: relative;
    top: -35px;
    left: -70px;
    background-color: #E5F8FF;
    font-size: 10px;
    color: #77DCFF;
}

main .main-3 li p {
    margin-bottom: 10px;
}

main .main-3 li p:nth-child(1) {
    font-size: 10px;
}

main .main-3 li p:nth-child(2) {
    font-size: 10px;
}

main .main-3 li p:nth-child(3) {
    font-size: 7px;
    color: green;
}

/* 页数框 */
main .main-4 {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
    margin-top: 50px;
}

main .main-4 .main-5 {
    width: 24px;
    height: 24px;
    margin: 0 10px;
    text-align: center;
}

main .main-4 .main-5 a {
    color: black;
}

main .main-4 .main-6 a {
    color: #00BDFF
}

main .main-4 .main-5:nth-child(1) {
    border-radius: 50%;
    background: #00BDFF;
}

main .main-4 .main-5:nth-child(1) a {
    color: white;
}

/* 尾部 */
.footer {
    margin-bottom: 50px;
}

.footer .footers {
    display: flex;
    margin-top: 20px;
}

.footer .footers .footer-1 {
    display: flex;
    flex-direction: column;
}

.footer .footers .footer-1 span {
    margin-bottom: 30px;
}

.footers .footer-1 ul li {
    width: 200px;
    height: 50px;
    color: #B3B3B3;
}

.footer .footers .footer-1 ul {
    height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.footer .footers .footer-2 {
    margin-right: auto;
    text-align: right;
}

.footer .footers .footer-2 span img {
    width: 110px;
    height: 110px;
}

.footer .footers .footer-2 p:nth-child(1) {
    font-size: 30px;
    margin-bottom: 10px;
}

.footer .footers .footer-2 p:nth-child(2) {
    color: #B3B3B3;
    margin-bottom: 30px;
}

.footer .footer-3 .footer3 {
    display: inline;
    margin-left: 295px;
    color: #B3B3B3;
    font-size: 20px;

}

.footer .footer-3 .footer2 {
    color: #B3B3B3;
    font-size: 15px;
}

footer {
    background-color: #F8F8F8;
}